Level-indicator and inclinometer



F. W. CHARLES.

LEVEL INDICATOR AND lNCLlNOMETER.

APPLICATION FILED SEPT-ll, 1919.

Patented June 15, 1920,

2 SHEETS-SHEET I.

In y n-Z2) r F. W. CHARLES.

LEVEL INDICATOR AND INCLINOMETER.

APPLICATION FILED SEPT-11,1919. Patented June 15, 1920.

2 SHEETSSHEET 2.

0 frwemi'oz 14K Ghagiea. X-W Kim UNITED STATES PATENT OFFICE.

FREDERICK W. CEARLES, 0F SEATTLE, WASHINGTON.

LEVEL-INDTQAIGR AND INCLINOMETER,

Specification of Letters Patent.

Patented June 15, 1920.

Application filed September 11, 1919. Serial No. 323,109.

vide a device which will be operative in all positions.

My invention also comprehends improvements in the details of construction which will be brought out in the accompanying specification and claims.

In the drawings:

Figure 1 is a front view of the device.

Fig. 2 is a sectional view on line 2-2 of Fig. 1. f

i Fig. 3 is a sectional view on line 3-3 of Fig. 2.

Fig. 4 is a sectional view on line 4- 1- of Fi 1.

i indicates a rectangular casing, having a cover 2, the edges of which extend beyond the edge of the receptacle and have screw holes therein for securing the device to an object the inclination of Which is to be measured.

The cover 2 is provided with an opening 4, in the center, having a graduated scale 5 around the edge thereof, and in which fits a spherical container 6, having an open-- ing through the neck 7, for the entrance of the spirit fluid 8 a closure 9 being provided to retain the fluid in the container.

A pair of straps 10 at right angles to each other, pass over the outer half of the container 6, and have their ends secured to the cover, at 10 forming a support to prevent the container from falling out of the casing. One of the straps has a graduated scale 10 on the outer face edge thereof and both straps are joined together by a spot of glue indicated at 10.

Apair of flexible slit straps 11 form a sling or inner support for the container, the slit portion 11 thereof assing around either side of the neck 7 0 the container and holding said container firmly in one position. The ends of the straps are secured to the cover at 11 The casing 15 provlded wlth openings 12,

over which is secured a reflector 13, carrying a socket and lamp 1 1 for illuminating the device, enabling readings to be taken at night if desired.

The container 6 is filled half fullcvvith the spirit fluid 8, as shown, which is preferably a partially transparent colored liquid.

With the device above described, an aviator may determine his angle withthe horizontal in any position, even when flying up-,

side down. The device may also be used on ships for determining the list of the ship, or the amount a ship is rolling in a sea. It

will be noted that the angles may be read Without turning the device in the direction of the incline to be measured which is necessary with the ordinary form of levels.

What I claim'is: 1. A level indicator and inclinometer comprising a casing, a cover therefor provided with a circular opening, there being a graduated scale on the surface of the cover around the edge of the opening, a spherical container provided with a pro jecting. portion and containing a spirit fluid,

a' pair of straps at right angles to each other closely embracing the container and secured to the cover, and forming an outer support for the container, one of the straps having a graduated scale thereon, a pair of split straps secured to the rear surface of the cover and closely embracing the surface of the container and forming an inner support for the container, the projecting portion on the latterextending throu h the splitportions of the straps, whereby the projecting portion on the container projecting through the split straps prevents movement of the container in the straps and the spirit fluid compared with the scales will indicate the angle of inclination.

2. A level indicator and inclinometer comprising a casing, a cover therefor pro vided With a circular opening, there being a graduated scale on the surface of the cover around the edge of the openlng, a spherical container provided with a projecting portion, and containing a spirit fluid, a pair of straps at right angles to each other closely embracing the container and secured to the rear face of the cover and forming an outer support for the container,

one of the straps havin a graduated scale I thereon, a pair of split strapssecured to over the openings, and lamps mounted in 10 the reflectors adapted to illuminate the interior of the casing and the container Where- 7 by the surface of the spirit liquid compared with the scales on the casing and strap will indicate the angle of inclination of an object 15 to which the device is attached.

In testimony whereof I aflix In signature.

FREDERICK W. C ARLES. 

